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Apple’s new 15-inch MacBook Pro lineup may look identical to its predecessor (the mid-2009 models that brought the fixed battery and SD card slot to the line), but under the hood, changes to both the CPU and GPU combine to make an impressive leap in performance over the systems these replace.

The new 15″ MacBook Pro comes in three standard configurations, all priced similarly to the last iteration. All three models come standard with 4GB of DDR3 RAM, two graphics processors, and a glossy 15.4 inch LED-backlit screen.

The $1799 entry-level system(MC371LL/A Apple Macbook Pro 15 2.4 ) comes with a 2.4GHz Core i5 processor and a 320GB hard drive; it replaces a $1699 model with a 2.53GHz Core 2 Duo processor, 2GB of RAM, a 250GB hard drive, and integrated graphics only. The next step up the line is a $1999 system with a 2.53GHz Core i5 processor and a 500GB hard drive, which takes the place of a $1999 2.66GHz Core 2 Duo-based system with 4GB of RAM, dual graphics, and a 320GB hard drive. At the top of the line sits a $2199 model with a 2.66GHz Core i7 processor and a 500GB drive; its $2299-predecessor had a 2.8GHz Core 2 Duo model with 4GB of RAM, and a 500GB hard drive.

What’s new?

The new 15-inch MacBook Pro models drop the Intel Core 2 Duo processors (used in Apple’s laptop line since late 2006) in favor of Intel’s Core i5 and Core i7 mobile processors. The Core i5 and i7 processors have a few interesting performance features, including Hyper-Threading, which uses virtual cores to double the amount of processing cores presented to the operating system. The processors have dual cores, but OS X treats them as having four cores. Another i5/i7 technology, Turbo Boost, allows the processor to speed up for a short period of time when necessary, or shut down unused cores and give the resources to the cores in use. Turbo Boost can increase the clock speed of the 2.4GHz Core i5 processor up to 2.93 Giga Hz, for example.

The mobile versions of the Core i5 and i7 used in the MacBook Pro differ from the desktop version found in the 27-inch iMac, which has four physical processing cores. The desktop Core i5 does not support Hyper-Threading, though the mobile version does.

Not only are the graphics processors new to these systems, there’s also a new automatic graphics switching technology developed by Apple that looks for frameworks used by individual apps at launch (such as OpenGL and Core Animation) to decide when to seamlessly switch from its energy-sipping integrated graphics to the higher-powered discrete graphics processor. Previously, a user had to decide which graphics to use and switching between them required logging out and back into OS X. One interesting note about the automatic switching: Any application that uses the required frameworks can trigger a switch from integrated to discrete graphics.

Also new is the support for inertial scrolling on the Multi-Touch glass trackpad. If you have an iPod touch,iPhone, or iPad, the scrolling will work the same way: wipe your finger up or down to scroll through a document. An Apple representative said that this feature is unique to the new MacBook Pros and is not available through a software update on older Mac laptops.

If you want to buy Great and Awesome computer then it has to be the Apple MacBook Pro MC371LL/A 15.4-Inch Laptop